Film cut-out



June 27, 1933. H. E. BUTLER 1,915,978

FILM CUT- OUT Filed 00T.. 26, 1932 Hehrg El. Butler,

His Attoheg.

I Patented June 27, 1933 f UNITED STATES PATENT OFFICE HENRY E. BUTLER, OF SCOTIA, NW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION F NEW YORK FILM CUT-OUT Application filed October 26, 1932. Serial No. 639,607.

My present invention relates to film cutouts and has for its main object the provision of an improved cut-out manufactured in the form of a strip from which individual cut-outs having the proper size may easily be separated when needed. i

My invention will be better understood fxom the following descri tion when considered in connection with t e accompanying drawing and its scope will be pointed out in the appended claims.

Referring to the drawing, Fig. 1 illustrates a somewhat enlarged plan view of a film cutout made in accordance with my invention;

Fig. 2 is a sectional view along line 2-2 of liig. 1; Fig. 3 illustrates a modification of my invention also somewhat enlarged, and Fig. 4 is a sectional view along line 4 4 of Fig. 3.

Referring to the drawing in detail, Figs. 1 and 2 illustrate a section of a film cut-out made in the form of a ribbon. 1t comprises a. metal strip 1() which is folded over at the edges to hold an insulating strip 11. r1`he 25 insulating strip 11 may be of any suitable material, such as varnished paper, for example, and is provided with spaced openings 12 which are used to space metallic members 13, the raised portions 14 of which are caused 3G to project through the perforations 12. The main body of member 13 may, of course., be of any desired shape.

Between the member 14 and the metal strip 10, an insulating film 16 is placed. This iilm 35 16 may be a coating of oxide or lacquer sprayed ontol member 13 or thin paper, cloth or the iilze. rEhe type and thickness of the film is chosen in accordance with the resistance required.

In assembling the cut-out above described, the metal strip 10 and insulating s-trip 11 are placed so that the holes 12 align with indentations 17 in the metal strip 10. An insulating film 16 and a member 13 are placed so that the raised portion 14 on member 13 projects thro-ugh hole 12 and the insulating film 1-6 is directly underneath member 13. When the edges of strip 10 are bent over, a rigid structure is formed. r1`his can be manufac- 0 tured in a continuous strip and partially cut or perforated along lines 18 which permits the handling of the cut-out in the form of rolls and an easy separation into individual cut-outs when needed. The spacing of lines 18 is such that -the edges of member 13 are spaced from the edges of the section a distance greater than the thickness of the insulating film 16.

A modication of my invention is disclosed in Figs. 3 and 4. In this modification two strips of metal 20 and 21 are se arated by an insulating lm 22. Additiona insulating strips 23 and 24 which are considerably greater in thickness than the insulating film 22, are added along the two edges for the purplose which will appear hereinafter.

T e metal strip 20 is provided With narrow openings 25 which extend between the inner edges of the two insulating strips 23 and 24. These holes 25 are spaced from each other approximately a distance equal to the length of an individual cut-out. When the parts are assembled in any suitable manner, such as by stitching with a non-conducting thread along lines 27 and 28 as indicated, the strip is partially cut or perforated along lines 30 so that the individual cut-outs may be separated from the strip as and when needed.

'1`he strips20 and 21 are of relatively thin metal. When, therefore, these strips are stitched together as indicated or when torn apart along the lines 30, there is a possibility of the burs from the upper strip contacting the lower strip and destroying the cut-out. For this reason the strip y20 is provided with the holes 25 which in effect cuts the metal away from the separating edge; and for the distance that the metal of the strip 20 is not cut away from the edge, the additional thickness of insulation is provided whereby the two strips are separated far enough to prevent the burs from one strip contacting the other strip.

What I claim as new and desire to secure by Letters Patent of the United States is:

I 1. A film cut-out comprising a metal strip partially divided into sections, an insulating film, and metal members separated from said metal strip by said insulating film and arranged to form integral units with said sec- 100 tions respectively when the said sections are completely separated from said strip.

2. A film cut-out comprising a metal strip partially divided into sections, an insulating film, and metal members separated from said insulating strip by Said insulating film arranged to form integral units With said sections respectively when they are separated from said strip and having their edges separated from thc edges of said sections a dis-2 and said strip, and an insulating member arranged to space said members along said strip and to hold thorn in fixed relation to said metal strip.

5. A film cut-out comprising a metal strip partially divided into sections, an insulating film and a second metal strip attached to said first strip, said second strip being partially divided into sections by openings eX- tendinglaterally of said strip and centered over the lines dividing said first strip, and insulating members extending between the edges of said strips and the ends of said openings whereby the edges of the respective sec* tions of said two strips are spaced from each other a distance greater than the thickness of said film when they are completely severed from said strips.

in witness whereof l have hereunto set my hand.

HENRY E. BUTLER. 

